Results of an experimental study of Cu-Co alloys containing 0.3 to 5.0 wt% Co are presented. A series of solution annealed Cu-Co alloys were analyzed by x-ray diffraction (XRD) and vibrating sample magnetometry (VSM). Each Ka doublet was resolved by fitting a Pearson Type VII profile. Precise lattice parameter as a function of cobalt content deviated significantly from Vegard’s law but was in r...

Ferromagnetic resonance (FMR) with an electron spin resonance (ESR) apparatus was investigated for super-paramagnetic particles within Daphnia resting eggs. High-field (HF) resonance lines near g=2 resulted from single superparamagnetic particles, were detected from ESR spectra of Daphnia resting eggs. The size of isolated superparamagnetic particles within Daphnia resting eggs was calculated t...

Using Monte Carlo methods we investigate the thermally activated magnetization switching of small ferromagnetic particles driven by an external magnetic field. For low uniaxial anisotropy one expects that the spins rotate coherently while for sufficiently large anisotropy the reversal should be due to nucleation. The latter case has been investigated extensively by Monte Carlo simulation of cor...

The ferromagnetic condensate is a well known device for mass generation in particle physics ever since the seminal work of Nambu and Jona-Lasinio. This condensate is a coherent state of particles with vanishing momentum. We suggest in this talk the use of another type of condensate in Quantum Field Theory which is a coherent state consisting of particles with non-zero momentum. The field operat...

Abstract The thermal instability of a couple-stress Rivlin-Ericksen ferromagnetic fluid with varying gravity field, suspended particles, rotation and magnetic field flowing through porous medium is investigated. dispersion relation has been developed solved analytically using the normal mode approach linear stability theory. effect rotation, couple stress, permeability on layer For stationary c...

concurrent hyperthermia and radiation therapy in treatment of cancer show a strong evidence of a synergistic enhancement. we designed a new self-regulating thermo-brachytherapy seed, which serves as a source of both radiation and heat for concurrent administration of brachytherapy and hyperthermia. the thermo-brachytherapy seed has a core of ferromagnetic material which produces heat when subje...

How animals sense, process, and use magnetic information remains elusive. In insects, magnetic particles are candidates for a magnetic sensor. Recent studies suggest that the ant Pachycondyla marginata incorporates ironcontaining particles from soil. We used leaf-cutter ants Atta colombica to test whether soil contact is necessary for developing a functional magnetic compass. A. colombica is th...